App gives you a good idea but..

The app gives you a nice idea of what to expect out of a new provider (my situation) however, the app itself isnt very intuitive. If you select a provider then go to select a different one, it wont always show you a list of providers beyond the one you already have selected. The rest disappear forcing you to reset the search to switch between providers. I have an iPhone 6.

One thing that would be nice is to have a comparison map. Select two providers to see where one is better than another. For example if youre comparing T-Mobile to AT&T, have the map show pink (T-Mobile brand colors) bubbles to depict areas T-Mobile has better coverage and blue bubbles (blue is att brand color) to depict where att is better. So you can just look at a map and see which color is most dominant for the areas you frequent or plan to go.

Zappy0888 about Opensignal Internet Speed Test, v3.0.3